Air-door



No. 750,617. PATENTED JAN. 26, 1904. J. T. DEVIESE.

AIR DOOR.

APPLICATION FILED JULY 30, 1903.

N0 MODEL.

FIG. I

UNITED STATES Patented January 26, 1904.

JOHN T. DEVIESE, OF CROWVNHILL, WEST VIRGINIA.

AIR-DOOR.

SPECIFICATION forming part of Letters Patent No. 750,617, dated January26, 1904. Application filed July 30, 1903- Serial No. 167,635. (Nomodel.)

To all whom it may concern.-

Be it known that I, JOHN T. DEvIEsE, a citizen of the United States,residing at Crownhill, in the county of Kanawha, and State of TestVirginia, have invented certain new and useful Improvements inAir-Doors; and I do hereby declare the followingto be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to doors for regulating the air or ventilatingcurrents in mines; and it consists in the novel construction andcombination of the parts hereinafter fully described and claimed.

In the drawings, Figure l is a plan view of the mine-door and thedevices for operating it. Fig. 2 is an end view of the same.

A is a railway-track in a mine, and B is a door-frame which extends overthe track.

C is a triangular plate secured to the top part of the door-frame andarranged in a horizontal position.

D represents the door-plates, which are connected to the door-frame byhinges (Z and which rest against the plate C when closed.

E is an electromagnet secured to the front part or apex of thesupporting-plate C. The door-plates D are provided with arms 6, whichproject from their top edges over the plate C. A bar 0 has its oppositeends pivotally connected with the free end portions of the arms 5 bymeans of links 0 or other equivalent connections.

An iron plate 6 is connected to the middle part of the bar 0 and isarranged to work in front or the electromagnet. When the electromagnetis energized, the iron plate is attracted, and the door-plates areturned on their hinges, so as to permit a car to pass along the track.

F is a tappet-bar which is supported parallel with one of thetrack-rails and which has a fiangef', which projects slightly above thetrack-rail. The wheels of the mine-cars are broader than the treads ofthe track-rails, and when a car passes along the track its wheels pressthe tappet-bar outwardly away from the track-rail.

Gr represents brackets secured to the track alongside the rails atconvenient distances apart.

H represents bars which are slidable longitudinally in the brackets Gand which are pivoted to the tappet-bar F by. pins h. Springs 9 areprovided for pressing the tappet-bar against the rail or toward therail.

I represents inclined contact-plates carried by the brackets G andinsulated from them by plates of insulating material 2'.

J represents contact-pieces which are slid-r able vertically in holes inthe bars H, and j represents springs which press the said contact-piecesdownwardly. The contact-pieces J are insulated from the bars H by bushesj of insulating material.

2 is the positive main conductor, and 3 is the negative main conductor,which are arranged along the track, so that a series of mine-doors canbe operated. A branch conductor 4 extends from the positive mainconductor 2 to the electromagnet, and a branch conductor 5 extends fromthe negative main conductor to the contactpiece J at each bracket. Abranch conductor 6 couples each contact-plate I with the electromagnet.

The tappet-bar extends under the mine-door for as far as desirable ineach direction, and its ends are flared or curved, so that the carwheelsmay push it back gently.

When a mine-car approaches a door, it operates the tappet-bar at one endand moves the nearest contact-piece into contact with the contact-plateto which it pertains, thereby completing the circuit through theelectromagnet. The electromagnet when thus energized attracts its ironplate and opens the mine-door. The remaining contact-pieces andcontact-plates of the series are placed in contact successively as thecar passes along the track, so that the door is held open by theelectromagnet until the car has passed through it, and the electromagnetis finally deenergized when the last car-wheel releases the rear end ofthe tappet-bar. The door-plates are closed automatically by theair-current or by any approved device for that purpose, .such as springsor weights commonly used for closing doors.

What I claim is 1. In a mine air-door, the combination, with the hingeddoor-plates provided with arms, of

a bar operatively connected with the said arms, a

an armature carried by the said bar, and an electromagnet for attractingthe armature and opening the door.

2. In a mine air-door, the combination, with a door-frame, a triangularsupporting-plate secured to the upper part of the door-frame,

and door-plates hinged to the said frame; of arms which project from thesaid door-plates, a bar operatively connected with the said arms, anarmature carried by the said bar, and an electromagnet secured to theapex of the said supporting-plate and operating when energized toattract the said armature and open the door.

3. The combination, with a mine air-door, an electromagnet, andintermediate actuating mechanism between the said eleetromagnet and themine-door; of a tappet-bar which extends under the said doorlongitudinally of the track, a series of spring-pressed bars whichnormally press the said tappet-bar laterally in one direction, contactpieces and plates arranged in pairs and placed in contact when the saidspring-pressed bars are retracted, and conductors connected with thesaid electromagnet and with the said contact pieces and plates.

In testimony whereof I aflix my signature in presence of two witnesses.7

JOHN T. DEVIESE.

Witnesses:

EDDIE SAULSBY, R. G. SPALDING.

